The material in this handbook is of great interest to professional and amateur astronomers, scientists, teachers at all levels, students, science writers, campers, scout and guide leaders, as well as interested general readers. The Observer's Handbook is an integral part of many astronomy courses at the secondary and university levels, and it should be on the reference shelf of every library.A smaller contribution (up to Ap1Ad), called diurnal libration, is associated with the shifting of the observer due to Eartha#39;s rotation. ... During 2002 the ascending node regresses from longitude 86.4Ad to 67.0Ad, and remains in Taurus. ... (at longitude 180Ad), and the monthly range of the Moona#39;s declination increases from its 1997 minimum of +18Ad to +26Ad by the end of 2002. ... In these diagrams the central, vertical, straight, double line represents the equatorial diameter of the disk of Jupiter.
|Title||:||The Observer's Handbook|